J/MNRAS/401/1965 Globular clusters in M104 (Harris+, 2010)
Diamonds on the Hat: globular clusters in the Sombrero galaxy (M104).
Harris W.E., Spitler L.R., Forbes D.A., Bailin J.
<Mon. Not. R. Astron. Soc., 401, 1965-1982 (2010)>
=2010MNRAS.401.1965H 2010MNRAS.401.1965H
ADC_Keywords: Galaxies, nearby ; Clusters, globular ; Photometry, HST
Keywords: globular clusters: general - galaxies: individual (M104) -
galaxies: star clusters
Abstract:
Images from the Hubble Space Telescope Advanced Camera for surveys are
used to carry out a new photometric study of the globular clusters
(GCs) in M104, the Sombrero galaxy. The primary focus of our study is
the characteristic distribution function of linear sizes [size
distribution function (SDF)] of the GCs. We measure the effective
radii for 652 clusters with point spread function-convolved King and
Wilson dynamical model fits. The SDF is remarkably similar to those
measured for other large galaxies of all types, adding strong support
to the view that it is a 'universal' feature of GC systems.
We use the Sombrero and Milky Way data and the formation models of
Baumgardt & Kroupa (2007MNRAS.380.1589B 2007MNRAS.380.1589B) to develop a more general
interpretation of the SDF for GCs.
Description:
Preprocessing of the raw image data is described in Paper I (Spitler
et al., 2006AJ....132.1593S 2006AJ....132.1593S). The mosaics of six pointings in each
filter were constructed at Space Telescope Science Institute and are
publicly available.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 66 652 Photometry and structural parameters for GCs in M104
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See also:
J/AJ/132/1593 : BVR photometry of NGC 4594 globular clusters (Spitler+, 2006)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- [SLS2006] Sequential number, from Paper I (J/AJ/132/1593)
5- 13 F9.6 h RAhour Rigth ascension in decimal hours (J2000)
15- 24 F10.6 deg DEdeg Declination in decimal degrees (J2000)
26- 30 F5.3 arcmin Rgc Projected galactocentric distance
32- 36 F5.2 mag Vmag V magnitude
38- 41 F4.2 mag B-V B-V colour index
43- 46 F4.2 mag B-R B-R colour index
48- 51 F4.2 pc rhl Mean half-light radius
53- 56 F4.2 pc e_rhl rms uncertainty on rhl
58- 61 F4.2 --- c Mean King central-concentration parameter
63- 66 F4.2 --- e_c ? rms uncertainty on c
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History:
From electronic version of the journal
References:
Spitler et al., Paper I 2006AJ....132.1593S 2006AJ....132.1593S, Cat. J/AJ/132/1593
(End) Patricia Vannier [CDS] 22-Jul-2010